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Sept. 19, 1961 G. C. ELLERBECK CALCULATING MACHINE l8 Sheets-Sheet 1 Filed May 10, 1956 -H M-HH ,0 E E S Q Q @w w w w w w w w w m w m m m w R cmewcmwcmv cm c Sept. 19, 1961 s. c. ELLERBECK CALCULATING MACHINE 18 Sheets-Sheet 2 Filed May 10, 1956 P 1961 G. c. ELLERBECK 3,000,557

CALCULATING MACHINE F-iled May 10, 1956 18 Sheets-Sheet 3 IE'IIEI .E'n

Sept. 19, 1961 e. c. ELLERBECK 3,000,557

CALCULATING MACHINE Filed May 10, 1956 18 Sheets-Sheet 4 Sept. 19, 1961 Filed May 10, 1956 G. C. ELLERBECK CALCULATING MACHINE 18 Sheets-Sheet 5 Sept. 19, 1961 s. c. EVLLERBECK CALCULATING MACHINE 18 Sheets-Sheet 6 Filed May 10, 1956 Sept. 19, 1961 e. c. ELLERBECK CALCULATING MACHINE 18 Sheets-Sheet '7 Filed May 10, 1956 Sept. 19, 1961 e. c. ELLERBECK CALCULATING MACHINE 18 Sheets-Sheet 8 Filed May 10, 1956 VIKZZZ/ g p 19, 1951 s. c. ELLERBECK' 3,000,557

CALCULATING MACHINE Filed May 10, 1956 18 Sheets-Sheet 9 Sept. 19, 196 ca.v c. ELLERBECK 3,000,557

CALCULATING MACHINE Filed May 10, 1956 1a Sheets-Sheet 11 N&

Sept. 19, 1961 e. 'c. ELLERBECK CALCULATING MACHINE Filed May 10, 1956 18 Sheets-Sheet 12 G. C. ELLERBECK CAECULATINGMACHINE 18 Sheets-Sheet 13 Filed May 10, 1956 Nmn an in m H MHMH Sept. 19, 1961 a. c. ELLERBECK 3,000,557

- CALCULATING MACHINE Filed May 10, 1956 7 1s sheets-Sheet 14 :E'IlE- 1 E Sept. 19, 1961 G. c. ELLERBECK CALCULATING MACHINE 18 Sheets-Sheet 15 Filed May 10, 1956 G. C. ELLERBECK Sept. 19, 1961 CALCULATING MACHINE l8 Sheets-Sheet 16 Filed May 10, 1956- Sept. 19, 1961 G. c. ELLERBECK CALCULATING MACHINE 18 Sheets-Sheet 1'? Filed May 10, 1956 -H mm-HmH omh Sept. 19, 1961 G. c. ELLERBECK CALCULATING MACHINE 18 Sheets-Sheet 18 Filed May 10, 1956 30 New mm-l m-Hh n United States Patent O 0 CALCULATING MACHINE Grant C. Ellerbeck, San Leandro, Calif., assign'or to Friden, Inc., a corporation of California Filed May 10, 1956, Ser. No. 584,003 36 Claims. (Cl. 235-63) I N D E X 7 Column 1. General Description 4 1. Selecting and actuating mechanism--- 6 2. Revolutions counter 7 3. Motor drive a 8 4. Carriage shift mechanism 8 5. Register clearing mechanism 10 6. Multiplier selection mechanism 12 7. Multiplication mechanism 13 II. Storage Register Multiplying Mechanism- 23 1. Method of operation 25 2. Conditioning key- Q 26 (a) Retract projecting tip of shit control arm 27 (b) Disable multiplier keyboard- 28 (0) Disable multiplierfeed pawl 28 (d) Disable multiplier carriage shift pawl 29 (e) Condition the machine for right shift on each operation of the shift control arm 29 (f) Conditioning the register multiplier feed mechanism 30 3. Auxiliary slides 31 4. Multiplier control cam 31 5. Slide feeding mechanism 31 6. Order selection mechanism 35 7. Shift control mechanism 36 8. Clearing mechanism 40 (a) Release shift latch 961 41 (b) Release the multiplying control link 826 and its latch 830 41 (c) Multiplier key release 42 (d) Clearing keyboard 42 (e) Normalize the auxiliary slides 43 9. Operation 43 III. Squaring Mechanism 45 1. Method of operation 46 2. Conditioning key 46 3. Auxiliary slides 47 4 to 8, inclusive. Identical with Sections 4 to 8, Part II 48 9. Zero block 48 10. Operation 50 This invention relates to a calculating machine, and particularly to an improved multiplying mechanism which, in a preferred embodiment, provides means particularly adapted to square a value set in the selection mechanism, i.e., to multiply such a factor by itself, either additively or subtractively, this application being a continuationin-part of my copending application, S.N. 419,402, filed March 29, 1954, now abandoned.

A primary object of the present invention is to provide a simple multiplying mechanism, and, for purposes of illustration, is shown as cooperating with a calculating machine of the type disclosed by the patent to Friden, No. 2,229,889, issued January 28, 1941. However, it will be recognized by those familiar with the art, that the mechanism of the present invention could be included readily in other types of calculating machines. The multiplying mechanism of the present invention can either be in addition to, or in substitution for, multiplying mechanisms of the types shown in the patents to Friden Nos. 2,371,752 of March'ZO, 1945 and 2,399,917 of May 7, 1946. For purposes of illustration, the present invention is shown in addition to these prior mechanisms, although it will be recognized that the mechanisms of these lastmentioned patents may be eliminated and the present in- 2 venti'on utilizedas the sole multiplying mechanism of the calculating machine.

Another primary object of the present invention is to provide a calculating machine in which a multiplier factor is set in the main keyboard of the machine and thence into a multiplier storage unit (the multiplicand also being set in the same keyboard), thus providing a simple means for multiplying a value set in the main keyboard by itself, whereby a value may be squared by inserting the value once in the main keyboard and thereafter operating a control key.

Another object of the present invention is to provide a multiplying control mechanism which may be supplemental to a conventional multiplying mechanism, such as that disclosed in the patents to Friden Nos. 2,371,752 and 2,399,917, and which may be operated to utilize either a factor set in the main keyboard or a value transferred from some register, such as the accumulator (product) register, thereby using either a main keyboard value or an accumulated value as a multiplier factor and which may utilize conventional multiplier control keys to selectively determine the type of operation to be performed.

Another object of the present invention is to provide a multiplying mechanism which utilizes parts already available in the Friden calculating machine for extracting a square root, such as is described in my Patent No. 2,736,494 of myself and another, issued February 28, 1956.

Another object of the present invention is to combine a multiplying mechanism with a machine for the extraction of square root of the type described in my joint Patent No. 2,736,494 whereby the mechanism of the present invention not only may be combined with a machine for extracting square root, but will use much of the mechanism of the square root machine and thereby save considerable space and many parts.

A secondary object of the present invention is to provide a calculating machine capable of multiplying a value set in the main keyboard, or selection mechanism, by itself, whereby a value may be squared by inserting the value once into the main keyboard and thereafter operating a control key. In this respect, the mechanism of the present invention may use a multiplier register into which .the keyboard value may be set as an intermediate step, or may omit the multiplier register and directly use the keyboard factor as the multiplier, as well as the multiplicand, as will be explained in the second embodiment to be described herein.

The present invention has the further advantage that I am enabled to utilize the multiplier control keys conventional in the machine of the Friden patents previously mentioned: (a) to clear the register with each problem, (b) to operate without clearing the register and thereby add one product to another in the accumulator, or (c) to negatively multiply the factor set in the multiplier storage (to thereby subtract a product or a square from values already registered in the accumulator).

The mechanism of my invention may be coupled with the conventional multiplier mechanism of the Friden patents above-mentioned, so that the operator can use the conventional multiplier for ordinary multiplication operations, or can use the mechanism of my invention either to square a value set in the keyboard or to use a value accumulated in the conventional accumulator as a multiplier factor.

A further object of the present invention is to provide an improved mechanism by means of which a value set in the main keyboard of a calculating machine may be quickly and accurately used as a multiplier factor when and as desired, either once or repeatedly.

These and other objects of my invention will be apparent from the description and claims which follow.

For purposes of disclosure, the invention will be shown and described as embodied in a square root machine of the type disclosed in my joint patent above-mentioned, which, in turn, is embodied in a machine of the type disclosed in the three patents to Carl M. Friden above mentioned. It will be understood, however, that the invention is not limited to incorporation in such a machine for it can be incorporated in, or applied to, other com mercial calculating, machines on the market, and does not need to be associated with a mechanism for the extraction of square root. Therefore, the machine shown in the accompanying drawings and described herein is to be considered as a preferred embodiment, used only for the purpose of exemplification, for the invention is not limitedto the machine so shown.

Parts of the mechanism disclosed in the above patents which are associated with the mechanism of this invention, are disclosed herein in order to show the environment of the novel structure of the present invention. llt will be understood that in these views many mechanisms and parts not associated with the mechanism of my invention, are eliminated for simplificationonly those parts being retained which cooperate with the novel mechanism of my machine. Such conventional mechanisms will be described as briefly as possible and yet explain the novel mechanism of my invention and to illustrate its operation. For a full disclosure of any of these mechanisms shown and herein briefly described, or for related mechanisms not shown or described, reference is made to the afore-mentioned patents, or others which may be mentioned hereafter.

It is believed that the invention will be more readily understood by a reference to the drawings which form a part of this specification, and in which:

FIG. 1 is a plan view of a preferred form of a machine with which my invention can be associated.

FIG. 2 is a cross-sectional view through one order of the actuating mechanism and register of the machine shown in FIG. 1.

'FIG. 3 is a left side view of the right-hand control plate, with certain mechanisms pertinent to my invention shown thereon.

FIG. 4 is a plan view of the shifting and clearing mechanisms conventional in the machine shown in FIG. 1.

FIG. 5 is a rear 'view of the machine shown in FIG. 1.

FIG. 6 is a longitudinal cross-sectional view of the multiplier selection and operating mechanism, such' as taken along the longitudinal vertical plane indicated by the line 6--6 of FIG. 1.

FIG. 7 is a longitudinal cross-sectional view of a por-- tion of the multiplier control mechanism, such as taken along the longitudinal vertical plane indicated by the line 7--7 of FIG. 1.

FIG. 8 is a detail of one of the conventional operating mechanisms of the machine with which my invention is associated.

FIG. 9 is a cross-sectional view looking toward the right and taken immediately to the right, or inside, of the left side control plate, as along the longitudinal vertical plane indicated by the line 9-9 of FIG. 1, and shows a portion of the multiplication control mechanisms.

FIG. 10 is a left side view of the left side control plate, being taken immediately to the left of the plane indicated by line 99, showing additional mechanisms associated with the multiplier mechanism.

FIG. 11 is a left side view taken from substantially the same plane as FIG. 10, but showing thereon the mechanisms of the present invention, and in effect, can be considered as superimposedover FIG. 10 to show the relationship between the conventional and new mechanisms.

FIG. 12 is a plan view, on an: enlarged scale, of mechanisms associated with my invention, and, in effect, is taken along the plane parallel to the keyboard'indicated by the line 1212 of FIGS. 9 and 11. r

FIG. 13 is a longitudinal cross-sectional view through the multiplying feed mechanism of my invention, and

4. shows particularly the similarity of the mechanism of the present invention to the square root mechanism of my joint patent, above-mentioned, as will be obvious by reference to FIG. 42 of that patent.

FIG. 14 is a detail, an enlarged scale, of the feed mechanism for the cam, or ordinal selection, shaft.

FIG. 15 is a front view of the multiplying (and square root) control assembly of my invention.

FIG. 16 is a cross-sectional view, taken on a longitudinal vertical plane, of the multiplier storage mechanism and the means for controlling a multiplication operation therefrom.

FIG. 17 is a left sideview, on a somewhat enlarged scale, of control mechanisms associated with my invention, takenon a vertical longitudinal plane intermediate the left-hand auxiliary and frame plates, as along the plane indicated by the line 17-17 of FIG. 1.

FIG. 18 is a detail of the keyboard clearing mechanism, being a view taken of the left side of the right side frame plate.

FIG. l9,is a front view of certain mechanisms shown in part in FIG. 18, relating particularly to the clearing of the multiplication mechanism.

FIG. 20 is a side view of the conventional selection bars and the auxiliary, or feed, slide of the second embodiment of my invention, with the parts in the 0 position.

FIG. 21 is a view similar toFIG. 20 but showing the relationship of the parts when a value of 5 has been entered by the auxiliary, or feed, slide.

FIG. 22 is a left side view of the1 to 5 selection bar with the interponent member mounted thereon.

FIG; 23 is a detail plan view of the parts shown in FIGS. 20 and 21.

FIG. 24' is a' partial plan view of the mechanism associated with the second embodiment of my invention for locking theselection slides registering a 0 value in their 0 position.

FIG. 25 is a front view of the mechanism shown in FIG. 24.

v FIG. 26 is a cross-sectional view through the 0 blocking mechanism of FIGS. 24 and 25, such as taken along the plane indicated by line 26'-26 of FIG. 25.

I; GENERAL DESCRIPTION The present invention, in its preferred form, is an improvement on' a calculating'machine of the type disclosed in the suave-mentio ed Patent No. 2,229,889, issued to Carl M. Friden on January 28,1941. The invention is shown, for purposes of ,exemplification, as combined with the multiplier mechanism shown in the" patents to Carl M; Friden, Nos. 2,371,752 and 2,399,917 issued on March 20, 1945 and May 7, 1946, respectively. The present invention is also shown as being applied to the machine for the extraction ;of square root shown and described'in my jointPatent No. 2,736,494, issued February28, 1956, above-mentioned, as I prefer that the mechanism of the present invention utilizes many of the parts shown in that patent. It will be understood, however, that the multiplying mechanism of the present invention and the square root extraction mechanism of my said patent, are not necessarily associated one with the other for, although many of the same parts are used, the two mechanisms operate separately and do notnecessarily have to be associated with the mechanism of the "other; Neither is it necessary that the multiplying mechanisms of the Friden patents be combined with the present mechanism, for the present invention, per 'se', constitutes an impnoved'm'ultiplying mechanism.

The complete machine with which myinvention is preferably associated is shown in FIG. 1. The machine comprises a body'portion 50 containing the actuating, selectand 'control'meclianisnis of the machineandan accumulator aridflre volutionsjcounter carriage 51,'which is mounted for endwise shifting movementtransversely of the body, or frame, portion 50. The carriage 51 has 

